Every one of those companies have extremely robust business models (ok npm I have no idea about), high profits and are not going anywhere. You are mistaking them for loss leader unicorn startups.
Rust is present in quite a lot of spaces. But companies outside sillicon valley or even the US do not advertise what they are doing as much.
I am as far from SV as possible and a fulltime Rust dev.
You need to consider most of those companies are so big they probably use every one of the top 20 languages. You argue as if they were ONLY using Rust.
No, but they are using it in critical parts of some key products, and in those parts, Rust is enabling them to write better code that requires less maintenance.
Rust is present in quite a lot of spaces. But companies outside sillicon valley or even the US do not advertise what they are doing as much.
I am as far from SV as possible and a fulltime Rust dev.